If the X3 allele is undergoing positive selection, what will be the likely end result? A There will be no individuals that are X3X3 B All individuals will be X1X3 or X2X3 because of the heterozygote advantage. C The variance of the trait will stay the same, but the mean value will increase. D The frequency of X3 will increase and it could potentially become fixed in the population. e The allele frequency of X1 and X2 will stay the same, but the allele frequency of X3 will increase.

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A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.